v1.1.2 pom

pom.xml

@@ -4,7 +4,7 @@
 	<modelVersion>4.0.0</modelVersion>
 	<groupId>com.inteligr8</groupId>
 	<artifactId>common-rest-api</artifactId>
-	<version>1.1.1</version>
+	<version>1.1.2</version>
 	<name>ReST API Client for Java</name>
 
 	<properties>

src/main/java/com/inteligr8/rs/BearerTokenAuthorizationFilter.java

@@ -1,7 +1,5 @@
 package com.inteligr8.rs;
 
-import java.io.UnsupportedEncodingException;
-
 import javax.ws.rs.client.ClientRequestContext;
 import javax.ws.rs.core.HttpHeaders;
 
@@ -30,7 +28,6 @@ public class BearerTokenAuthorizationFilter implements AuthorizationFilter {
 	 * This method applies the 'Authorization' header to the {@link ClientRequestContext}.
 	 * 
 	 * @param requestContext A request context.
-	 * @throws UnsupportedEncodingException The 'utf-8' encoding is not supported.
 	 */
 	@Override
 	public void filter(ClientRequestContext requestContext) {

src/main/java/com/inteligr8/rs/ClientConfiguration.java

@@ -29,6 +29,20 @@ public interface ClientConfiguration {
 		return null;
 	}
 	
+	/**
+	 * @return The client ID for Client Enforcement authentication.
+	 */
+	default String getClientId() {
+		return null;
+	}
+
+	/**
+	 * @return The corresponding client secret for the client ID in Client Enforcement authentication.
+	 */
+	default String getClientSecret() {
+		return null;
+	}
+	
 	/**
 	 * @return The token for BEARER authorization.
 	 */
@@ -47,14 +61,14 @@ public interface ClientConfiguration {
 	 * @return The client ID provided by the OAuth IdP administrator.
 	 */
 	default String getOAuthClientId() {
-		return null;
+		return this.getClientId();
 	}
 
 	/**
 	 * @return The corresponding client secret for the client ID provided by the OAuth IdP administrator.
 	 */
 	default String getOAuthClientSecret() {
-		return null;
+		return this.getClientSecret();
 	}
 	
 	/**
@@ -115,6 +129,8 @@ public interface ClientConfiguration {
 				return new OAuthClientCredentialAuthorizationFilter(this.getOAuthTokenUrl(),
 						this.getOAuthClientId(), this.getOAuthClientSecret());
 			}
+		} else if (this.getClientId() != null) {
+			return new ClientEnforcementAuthorizationFilter(this.getClientId(), this.getClientSecret());
 		} else if (this.getBasicAuthUsername() != null) {
 			return new BasicAuthorizationFilter(this.getBasicAuthUsername(), this.getBasicAuthPassword());
 		} else {

src/main/java/com/inteligr8/rs/ClientCxfConfiguration.java

@@ -13,7 +13,7 @@ public interface ClientCxfConfiguration extends ClientConfiguration {
 	 * wreck havoc on your implementation.  This method allows you to
 	 * explicitly by-pass the default bus.
 	 * 
-	 * @see https://cxf.apache.org/docs/bus-configuration.html
+	 * See https://cxf.apache.org/docs/bus-configuration.html.
 	 * 
 	 * @return true to use the default bus; false otherwise.
 	 */

src/main/java/com/inteligr8/rs/ClientEnforcementAuthorizationFilter.java

@@ -0,0 +1,49 @@
+package com.inteligr8.rs;
+
+import javax.ws.rs.client.ClientRequestContext;
+
+/**
+ * This class is the base for implementations of client authorization similar
+ * to OAuth-based flows.
+ *  
+ * @author brian@inteligr8.com
+ */
+public class ClientEnforcementAuthorizationFilter implements AuthorizationFilter {
+	
+	private final String clientId;
+	private final String clientSecret;
+	
+	/**
+	 * This constructor creates a client authorization filter using a client ID
+	 * registered with the endpoint.
+	 * 
+	 * @param clientId An endpoint provided client ID.
+	 */
+	public ClientEnforcementAuthorizationFilter(String clientId) {
+		this(clientId, null);
+	}
+
+	/**
+	 * This constructor creates a client authorization filter using a client ID
+	 * registered with the endpoint, and the corresponding client secret.
+	 * 
+	 * @param clientId An endpoint provided client ID.
+	 * @param clientSecret A secret corresponding to the client ID.
+	 */
+	public ClientEnforcementAuthorizationFilter(String clientId, String clientSecret) {
+		this.clientId = clientId;
+		this.clientSecret = clientSecret;
+	}
+
+	/**
+	 * This method applies the client headers to the {@link ClientRequestContext}.
+	 * 
+	 * @param requestContext A request context.
+	 */
+	@Override
+	public void filter(ClientRequestContext requestContext) {
+		requestContext.getHeaders().add("client_id", this.clientId);
+		requestContext.getHeaders().add("client_secret", this.clientSecret);
+	}
+
+}

src/main/java/com/inteligr8/rs/ClientJerseyImpl.java

@@ -26,7 +26,11 @@ public abstract class ClientJerseyImpl extends Client implements InitializingBea
 	public void afterPropertiesSet() {
 		this.register();
 	}
-	
+
+	/**
+	 * This method registers the Jersey library as the default provider for the
+	 * JAX-RS specification.
+	 */
 	public void register() {
 		if (RuntimeDelegate.getInstance() == null) {
 			this.logger.info("Setting JAX-RS runtime delegate to the Jersey library");

src/main/java/com/inteligr8/rs/OAuthAuthorizationFilter.java

@@ -27,14 +27,42 @@ public abstract class OAuthAuthorizationFilter implements AuthorizationFilter {
 	private long expiration;
 	private String refreshToken;
 	
+	/**
+	 * This constructor creates an OAuth-based authorization filter using the
+	 * OAuth identity provider token URL and a client ID registered with the
+	 * same OAuth identity provider.
+	 * 
+	 * @param tokenUrl An OAuth identity provider token URL.
+	 * @param clientId An OAuth identity provider client ID.
+	 */
 	public OAuthAuthorizationFilter(String tokenUrl, String clientId) {
 		this(tokenUrl, clientId, null);
 	}
-	
+
+	/**
+	 * This constructor creates an OAuth-based authorization filter using the
+	 * OAuth identity provider token URL, client ID registered with the
+	 * same OAuth identity provider, and the corresponding client secret.
+	 * 
+	 * @param tokenUrl An OAuth identity provider token URL.
+	 * @param clientId An OAuth identity provider client ID.
+	 * @param clientSecret A secret corresponding to the client ID.
+	 */
 	public OAuthAuthorizationFilter(String tokenUrl, String clientId, String clientSecret) {
 		this(tokenUrl, clientId, clientSecret, null);
 	}
-	
+
+	/**
+	 * This constructor creates an OAuth-based authorization filter using the
+	 * OAuth identity provider token URL, client ID registered with the
+	 * same OAuth identity provider, the corresponding client secret, and OAuth
+	 * scope.
+	 * 
+	 * @param tokenUrl An OAuth identity provider token URL.
+	 * @param clientId An OAuth identity provider client ID.
+	 * @param clientSecret A secret corresponding to the client ID.
+	 * @param scope An OAuth scope.
+	 */
 	public OAuthAuthorizationFilter(String tokenUrl, String clientId, String clientSecret, String scope) {
 		this.tokenUrl = tokenUrl;
 		this.clientId = clientId;